· Levitra works by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. Levitra is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Levitra does not cure erectile dysfunction or increase sexual desire.With a sudden drop in blood pressure, you could get dizzy, faint, or have a heart attack or stroke. These are not all the side effects of Levitra. Staxyn vardenafil disintegrating tablets should not be used in place of Levitra vardenafil regular tablets. Vardenafil can be taken with or without food. This medicine does not prevent the spread of sexually transmitted diseases such as human immunodeficiency virus HIV. · Levitra; Staxyn; Descriptions. Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where this enzyme works. About Vardenafil (Levitra) for ED. Levitra (vardenafil hydrochloride) is an oral medication taken to treat erectile dysfunction (ED). It’s in the same class of drugs as other popular ED. In combination with sexual stimulation, vardenafil works by increasing blood flow to the penis to help a man get and keep an drug does not protect against sexually transmitted.Speak to your doctor about ways to guard against sexually transmitted diseases. Ask your doctor if it is safe for you to have sexual activity. Levitra is only for men with ED. Do not use Levitra if you are using these drugs. Vardenafil can be taken with or without food. Do not use any other medicine to treat impotence unless your doctor tells you to. Common side effects may include: flushing sudden warmth, redness, or tingly feeling ; stuffy nose, sinus pain; upset stomach; or back pain.